Systematic Research of Lepton Flavor Mixings and Mass Matrix

轻子风味混合和质量基质的系统研究

• 批准号: 07640413
• 负责人: TANIMOTO Morimitsu
• 金额: $ 0.9万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640413/
• 关键词: Neutrino Oscillation; Flavor Mixings; Mass Matrix; CP Violation; Flavor Mixing; ニュートリノ; 世代

The research results are summarized as follows.1. In MSSM,the flavor mixing changes considerably due to the renormalization group effect between the GUT scale and the EW scale. For example, if we have sin rheta<greater than or equal> 0.27, which is the mixing between the second generation and the third one at the GUT scale, we get enough large flavor mixing to explain the atmospheric neutrino anomaly at the2. If we assume the neutrino mass hierarchy, the mass matrix models, which explain both experimental results of the atmospheric neutrino and LSND,predict the non-observation of the neutrino oscillation at CHORUS and NOMAD.In other words, either experimental result of the atmospheric neutrino or LSND will be found to be not true if CHORUS and NOMAD will find the evidence of the neutrino oscillation.3. Zee model is consistent with both experimental results of the atmospheric neutrino and LSND.If we add the sterile neutrino nu_s to the model, we can solve the solar neutrino problem as well as the atmospheric neutrino one and LSND one.4. CP violation in the neutrino oscillations is possibly observed in the long baseline experiments. Although the matter effect of the earth is important generally in those experiments, the effect is very small if m_3, m_2 <greater than or equal> leV.

研究结果如下： 1．在MSSM中，由于GUT尺度和EW尺度之间的重整化群效应，风味混合发生了很大的变化。例如，如果我们有 sin rheta<大于或等于> 0.27，这是 GUT 尺度上第二代和第三代之间的混合，我们就得到足够大的味道混合来解释 2 处的大气中微子异常。如果我们假设中微子质量等级，则解释大气中微子和LSND实验结果的质量矩阵模型预测了CHORUS和NOMAD中微子振荡的未观测到。换句话说，大气中微子的实验结果如果CHORUS和NOMAD找到了中微子振荡的证据，则LSND将被证明是不正确的。 3． Zee模型与大气中微子和LSND的实验结果一致。如果在模型中加入惰性中微子nu_s，不仅可以解决太阳中微子问题，还可以解决大气中微子一和LSND一的问题。4．中微子振荡中的CP破坏可能在长基线实验中观察到。尽管地球的物质效应在这些实验中通常很重要，但如果m_3、m_2 <大于或等于> 1eV，则影响很小。

项目成果

M.Tanimoto: "Is CP Violation Observable in Long Baseline Neutrino Oscillation Experiments?" Physical Review. D55. 322-329 (1997)

M.Tanimoto：“在长基线中微子振荡实验中可以观察到 CP 破坏吗？”

Y.Koide: "U(3)-Family Nonet Higgs Boson and its Phenomenology" Zeitschrift fur physik. C72. 333-344 (1996)

Y.Koide：“U(3)-家族诺内特希格斯玻色子及其现象学”Zeitschrift 物理学。

小出義夫: "V(3)-Family Nonet Higgs Boson and its phenomenology" Zeitschrift fiir physil C. (印刷中). (1996)

Yoshio Koide：“V(3)-Family Nonet Higgs Boson 及其现象学”Zeitschrift fiir phyl C.（出版中）。

M.Tanimoto: "Structures of neutrino flavor mixing matrix and neutrino oscillations at CHORUS and NOMAD" physical Review. D53. 6632-6637 (1996)

M.Tanimoto：“CHORUS 和 NOMAD 中微子味道混合矩阵的结构和中微子振荡”物理评论。

N.Haba: "Spontaneous CP Violation and Higgs masses in the Next-to-Minimal Supersymmetric Model" physical Review. D54. 6928-6937 (1996)

N.Haba：“接近最小超对称模型中的自发 CP 破坏和希格斯质量”物理评论。